JLG 510AJ Service Manual - Manual (Page 248)

SECTION 5 - HYDRAULICS AND HYDRAULIC SCHEMATICS
5-28 – JLG Lift – 3121181
Steer Cylinder
DISASSEMBLY
Refer to Figure 5-64.
CONTAMINATION MAY DAMAGE EQUIPMENT. DISASSEMBLE CYLINDER ON A
CLEAN WORK SURFACE IN A DIRT FREE WORK AREA.
1. Connect a suitable auxiliary hydraulic power source to
cylinder port block fitting.
DO NOT FULLY EXTEND CYLINDER TO THE END OF STROKE. RETRACT CYLINDER
SLIGHTLY TO AVOID TRAPPING PRESSURE.
2. Operate hydraulic power source and extend cylinder.
Shut down and disconnect power source. Adequately
support cylinder rod.
3. Place cylinder barrel in a suitable holding fixture. Tap
around outside of cylinder head retainer with a suitable
hammer to break thread-locking compound.
Figure 5-61. Cylinder Barrel Support
4. Remove burrs and contamination from cylinder before
disassembly.
5. Unscrew cylinder head with hook spanner on rod end to
be pulled.
Figure 5-62. Removing Cylinder Head
PULLING ROD OFF-CENTER CAN DAMAGE PISTON AND C YLINDER BARREL
SURFACES. USE EXTREME CARE WHEN REMOVING CYLINDER ROD AND PIS-
TON.
6. Clamp securely. Apply pressure to rod pulling device
and carefully withdraw complete rod assembly from cyl-
inder barrel.
Figure 5-63. Cylinder Rod Support
7. Remove cylinder head from opposite end.